PyQt5，如何使用QAbstractButton制作图像切换按钮

from PyQt5.QtWidgets import QApplication, QMainWindow, QAbstractButton, QLabel
from PyQt5.QtGui import QPixmap
from PyQt5.QtCore import Qt

class ImageButton(QAbstractButton):
    def __init__(self, normal_image_path, hover_image_path, parent=None):
        super().__init__(parent)
        self.normal_image = QPixmap(normal_image_path)
        self.hover_image = QPixmap(hover_image_path)
        self.current_image = self.normal_image

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.drawPixmap(self.rect(), self.current_image)

    def enterEvent(self, event):
        self.current_image = self.hover_image
        self.update()

    def leaveEvent(self, event):
        self.current_image = self.normal_image
        self.update()

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.button = ImageButton("normal_image.png", "hover_image.png", self)
        self.button.setGeometry(50, 50, 100, 100)

if __name__ == '__main__':
    app = QApplication([])
    window = MainWindow()
    window.show()
    app.exec_()